From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_2 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AB43DC41621 for ; Tue, 24 Mar 2020 09:08:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8C9272070A for ; Tue, 24 Mar 2020 09:08:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727148AbgCXJIw (ORCPT ); Tue, 24 Mar 2020 05:08:52 -0400 Received: from mx2.suse.de ([195.135.220.15]:39006 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726845AbgCXJIw (ORCPT ); Tue, 24 Mar 2020 05:08:52 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id EB2D0ACCA; Tue, 24 Mar 2020 09:08:50 +0000 (UTC) Message-ID: <1585040918.7151.6.camel@suse.de> Subject: Re: lockdep warning in urb.c:363 usb_submit_urb From: Oliver Neukum To: Qais Yousef Cc: Greg Kroah-Hartman , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Date: Tue, 24 Mar 2020 10:08:38 +0100 In-Reply-To: <20200323172932.5s7txy2juhut5qdv@e107158-lin.cambridge.arm.com> References: <20200323143857.db5zphxhq4hz3hmd@e107158-lin.cambridge.arm.com> <1584977769.27949.18.camel@suse.de> <20200323172932.5s7txy2juhut5qdv@e107158-lin.cambridge.arm.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.26.6 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Am Montag, den 23.03.2020, 17:29 +0000 schrieb Qais Yousef: > Hi Oliver Hi, > First time I use dynamic debugging, hopefully I've done correctly. I am afraid not. > echo "file drivers/usb/* +p" > /sys/kernel/debug/dynamic_debug/control Overkill but correct. +mpf would be even better > $REPRODUCE Good > cat /sys/kernel/debug/dynamic_debug/control | grep usb > usb.debug No. /sys/kernel/debug/dynamic_debug/control holds the collection of the messages that may be triggered, but it does not tell you which messages are triggered and in which order. The triggered messages end up in syslog. So you would use 'dmesg' I am afraid you redid the test correctly and then threw away the result. Could you redo it and just attach the output of dmesg? Sorry Oliver